Skip to content

All Products

Aviation Intelligence

Alerts & Airspace

Free Pilot Tools & Widgets

RC Aviation

Games & Learning

Weather Research & More

Pilot Resources

My Airports

Your shortcuts, saved on this device. Search to add an airport.

No airports saved yet. Add the fields you visit most.

Ask ATIS

Route on-time record

LGA to IAH: most on-time flights and the best time to fly

New York (LaGuardia Airport) to Houston (George Bush Intercontinental Airport). 4,081 nonstop flights in Jun 2025 to May 2026, 76% arrived within 15 minutes and 2.7% were cancelled. The most reliable flight number was United 2371 at 7:45 AM.

Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.

LGA → IAH

New York to Houston: 4,081 nonstop flights a year

On time (12 months)

76%

Cancelled

2.7%

avg delay 22 min

Best time to leave

Before 9 AM

91% on time vs 58% 3 to 6 PM

Most reliable airline

Spirit

77% chance on time

Check LGA to IAH fares

Fares open on our travel partner (Aviasales). Pick the flight number you chose here.

Most reliable nonstop flights

Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.

  1. #1 · United 2371

    7:45 AM → 10:47 AM4h 02m nonstop

    Local times, typical schedule. Last flown 2026-05-20.

    91%

    chance on time

    On time (history)
    93%
    Cancelled
    1.9%
    Avg arrival delay
    8 min
    • Arrived on time 93% of the time (302 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 91% on time; 3 to 6 PM: 58%).
    • Departs outside LGA's trouble window (noon to 6 PM, when 54% of its 285 ground stops and delay programs started).

    Strong track record · 302 flights

    Find United 2371 fares Opens this date on Aviasales

  2. #2 · United 1935

    6:00 AM → 8:45 AM3h 45m nonstop

    Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as United 1595, 1612; its record covers all of them.

    90%

    chance on time

    On time (history)
    92%
    Cancelled
    0.0%
    Avg arrival delay
    3 min
    • Arrived on time 92% of the time (64 flights, Jun 2025 to May 2026).
    • Never cancelled in 64 scheduled flights.
    • Leaves in this route's most on-time window (Before 9 AM: 91% on time; 3 to 6 PM: 58%).
    • Departs outside LGA's trouble window (noon to 6 PM, when 54% of its 285 ground stops and delay programs started).

    Moderate track record · 64 flights

    Find United 1935 fares Opens this date on Aviasales

  3. #3 · United 2662

    7:29 AM → 10:13 AM3h 44m nonstop

    Local times, typical schedule. Last flown 2026-05-30.

    86%

    chance on time

    On time (history)
    78%
    Cancelled
    0.0%
    Avg arrival delay
    10 min
    • Arrived on time 78% of the time (9 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 91% on time; 3 to 6 PM: 58%).
    • Departs outside LGA's trouble window (noon to 6 PM, when 54% of its 285 ground stops and delay programs started).
    • Short track record (9 flights), so its score leans on the airline's record at this hour.

    Limited track record · 9 flights

    Find United 2662 fares Opens this date on Aviasales

  4. #4 · United 1685

    12:35 PM → 3:40 PM4h 05m nonstop

    Local times, typical schedule. Last flown 2026-05-20. Same departure also flew as United 1407; its record covers all of them.

    84%

    chance on time

    On time (history)
    87%
    Cancelled
    0.0%
    Avg arrival delay
    8 min
    • Arrived on time 87% of the time (46 flights, Jun 2025 to May 2026).
    • Never cancelled in 46 scheduled flights.
    • Departs inside LGA's trouble window: 54% of its 285 ground stops and delay programs started between noon and 6 PM.
    • Lands inside IAH's trouble window: 60% of its 92 ground stops and delay programs started between noon and 6 PM.

    Limited track record · 46 flights

    Find United 1685 fares Opens this date on Aviasales

  5. #5 · United 1072

    12:29 PM → 3:40 PM4h 11m nonstop

    Local times, typical schedule. Last flown 2026-03-28.

    82%

    chance on time

    On time (history)
    87%
    Cancelled
    4.2%
    Avg arrival delay
    18 min
    • Arrived on time 87% of the time (23 flights, Jun 2025 to May 2026).
    • Departs inside LGA's trouble window: 54% of its 285 ground stops and delay programs started between noon and 6 PM.
    • Lands inside IAH's trouble window: 60% of its 92 ground stops and delay programs started between noon and 6 PM.
    • Short track record (23 flights), so its score leans on the airline's record at this hour.

    Limited track record · 23 flights

    Find United 1072 fares Opens this date on Aviasales

  6. #6 · United 2617

    10:00 AM → 1:05 PM4h 05m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    82%

    chance on time

    On time (history)
    86%
    Cancelled
    3.1%
    Avg arrival delay
    15 min
    • Arrived on time 86% of the time (316 flights, Jun 2025 to May 2026).
    • Cancelled 3.1% of the time (10 of 326).
    • Departs outside LGA's trouble window (noon to 6 PM, when 54% of its 285 ground stops and delay programs started).
    • Lands inside IAH's trouble window: 60% of its 92 ground stops and delay programs started between noon and 6 PM.

    Strong track record · 316 flights

    Find United 2617 fares Opens this date on Aviasales

  7. #7 · Delta 2140

    6:00 AM → 9:10 AM3h 59m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    81%

    chance on time

    On time (history)
    87%
    Cancelled
    9.0%
    Avg arrival delay
    13 min
    • Arrived on time 87% of the time (131 flights, Jun 2025 to May 2026).
    • Cancelled 9.0% of the time (13 of 144).
    • Leaves in this route's most on-time window (Before 9 AM: 91% on time; 3 to 6 PM: 58%).
    • Departs outside LGA's trouble window (noon to 6 PM, when 54% of its 285 ground stops and delay programs started).

    Moderate track record · 131 flights

    Find Delta 2140 fares Opens this date on Aviasales

  8. #8 · United 1627

    2:20 PM → 5:25 PM4h 05m nonstop

    Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as United 2030; its record covers all of them.

    77%

    chance on time

    On time (history)
    81%
    Cancelled
    0.0%
    Avg arrival delay
    19 min
    • Arrived on time 81% of the time (62 flights, Jun 2025 to May 2026).
    • Never cancelled in 62 scheduled flights.
    • Departs inside LGA's trouble window: 54% of its 285 ground stops and delay programs started between noon and 6 PM.
    • Lands inside IAH's trouble window: 60% of its 92 ground stops and delay programs started between noon and 6 PM.

    Moderate track record · 62 flights

    Find United 1627 fares Opens this date on Aviasales

  9. #9 · Delta 2099

    10:45 AM → 1:58 PM4h 06m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    73%

    chance on time

    On time (history)
    76%
    Cancelled
    3.8%
    Avg arrival delay
    19 min
    • Arrived on time 76% of the time (329 flights, Jun 2025 to May 2026).
    • Cancelled 3.8% of the time (13 of 344).
    • Departs outside LGA's trouble window (noon to 6 PM, when 54% of its 285 ground stops and delay programs started).
    • Lands inside IAH's trouble window: 60% of its 92 ground stops and delay programs started between noon and 6 PM.

    Strong track record · 329 flights

    Find Delta 2099 fares Opens this date on Aviasales

  10. #10 · United 2674

    2:00 PM → 4:58 PM3h 58m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    70%

    chance on time

    On time (history)
    55%
    Cancelled
    0.0%
    Avg arrival delay
    19 min
    • Arrived on time 55% of the time (11 flights, Jun 2025 to May 2026).
    • Departs inside LGA's trouble window: 54% of its 285 ground stops and delay programs started between noon and 6 PM.
    • Lands inside IAH's trouble window: 60% of its 92 ground stops and delay programs started between noon and 6 PM.
    • Short track record (11 flights), so its score leans on the airline's record at this hour.

    Limited track record · 11 flights

    Find United 2674 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • Spirit Airlines77%

    333 flights · 81% on time as flown · 3.7% cancel

  • United Airlines75%

    2,378 flights · 76% on time as flown · 1.9% cancel

  • SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)73%

    32 flights · 81% on time as flown · 2.8% cancel

  • Delta Air Lines71%

    1,338 flights · 74% on time as flown · 3.6% cancel

On time by departure time

All airlines, scheduled local departure, Jun 2025 to May 2026.

  • Before 9 AM91%

    1,137 flights · avg delay 7 min

  • 9 AM to noon79%

    818 flights · avg delay 19 min

  • Noon to 3 PM76%

    910 flights · avg delay 20 min

  • 3 to 6 PM58%

    627 flights · avg delay 36 min

  • 6 to 9 PM61%

    589 flights · avg delay 42 min

Best day: Saturday (83%). Worst: Sunday (77%).

Smarter routing

Nearby airports that run more on time

  • EWR → IAH 77% chance on time

    Newark Liberty International Airport to George Bush Intercontinental Airport · 3,758 flights a year · 17 mi from your airports · yours: 74%

    Rank flightsFares

On time by month

All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.

J
78
F
81
M
83
A
81
M
70
J
75
J
68
A
83
S
85
O
84
N
85
D
77

What delays this route

  • Late-arriving aircraft34%
  • Airline (crew, maintenance, boarding)33%
  • Air traffic control and airport volume27%
  • Severe weather6%

Share of delay minutes by the cause airlines report to the US DOT.

Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure

LGA to IAH questions

What time of day is best to fly LGA to IAH?
Before 9 AM: 91% of flights arrived on time, against 58% for departures 3 to 6 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
Which airline is most on time from LGA to IAH?
Spirit, with a season-adjusted 77% chance of operating and arriving on time over 333 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
What is the worst month for delays on LGA to IAH?
July (68% on time); the best was November (85%), averaged over Jun 2023 to May 2026.
Is this a prediction for my flight?
No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.

More routes from LGA

Live status: FAA delays and ground stops